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Two point charges 3.0cm apart have an electric potential energy -130?J. The total charge is 15nC .
What is the lesser charge?
What is the greater charge?
What is the radius of the pen. How far should it now sail to reach its original destination.
A motorboat heads due east 13.3 m/s across a river that flows toward the south at a speed of 4.5m/s. Illustrate what is the magnitude of the resultant velocity relative to an observer on the shore?
There are two major types of aberration (defective image formation) in lenses: spherical and chromatic. Spherical aberration comes from fact that a spherical lens has the property of focusing parallel rays to a single point only approximately.
A 2.90 m long, 320 kg steel beam extends horizontally from the point where it has been bolted to the framework of the new building under construction. A 66 kg construction worker stands at the far end of the beam.
A 2kg ball traveling to the right with a speed of 4 m/s collides with a 4 kg ball traveling to the left with a speed of 2 m/s. The total momentum of the two balls after the collision is what.
The collision is not head-on. After the collision, the two pucks fly apart with the angles shown in the drawing. Find out the final speed of puck A also Find out the final speed of puck B. m/s
A certain superconducting magnet in the form of a solenoid of length 0.30 m can produce a magnetic field of 13.0 T in its core when its coils carry a current of 105 A. The windings, made of a niobium-titanium alloy, must be cooled to 4.2 K. Find o..
A guitar string is 91.00cm long and has a mass of 3.6g. From the bridge to the support post (= L) is 60 cm, and the string is under a tension of 551 N.
A block is attached to a ceiling by a spring fo force constant k. When pulled down and released the block undergoes simple harmonic motion. The amplitude is 2, and the frequency is 1/(16pi). If the mass of the block is 3.14 kg, what is the spring ..
Now suppose that the two masses continue to move at the speed from Part A until they encounter a rough surface. The coefficient of friction between the masses and the surface is . If the blocks come to rest after a distance, which of following equ..
A radio controlled car increases its kinetic energy from 4J to 12J over the distance of 2 m. What was the average net force on the car during this interval.
A toy car with mass of m=166 GRAMS crashes into a spring with constant k=45 N/m. If the car was going v=1.5 m/s, then how far will the spring compress.
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